Question

我有一个非常简单的设置，我无法在silverlight中工作。我订购了一系列OrderPayments。这些对象是实体框架模型的一部分，并通过WCF RIA服务公开。我可以完美地绑定Order类上的任何基本属性，但我想绑定到列表框以显示OrderPayments。这是ListBox的XAML。

<ListBox ItemsSource="{Binding Data.OrderPayments, ElementName=orderDataSource}"></ListBox>

列表框中没有任何内容，并且显示的订单至少有一个OrderPayment。 orderDataSource是包含Order的DomainDataSource。奇怪的是，我没有收到任何绑定错误，当我使用以下代码绑定到TextBlock时：

<TextBlock Text="{Binding Data.OrderPayments, ElementName=orderDataSource}" />

文本'OrderPayment'输出到屏幕。为了让Silverlight真正获取对象的引用，我还需要做些什么吗？

以下整个XAML：

<riaControls:DomainDataSource AutoLoad="True" Name="orderDataSource" QueryName="GetOrder">
        <riaControls:DomainDataSource.QueryParameters>
            <riaControls:Parameter ParameterName="orderid" Value="1" />
        </riaControls:DomainDataSource.QueryParameters>
        <riaControls:DomainDataSource.DomainContext>
            <ds:CEWCPSDomainContext />
        </riaControls:DomainDataSource.DomainContext>
    </riaControls:DomainDataSource>

    <StackPanel Orientation="Vertical" Margin="12">
        <StackPanel Orientation="Horizontal">
            <Button Width="100" Height="50" Content="Save &amp; Return" Margin="0,0,12,12" />
            <Button Width="100" Height="50" Content="Orders" Margin="0,0,12,12" />
            <Button Width="100" Height="50" Content="Emails" Margin="0,0,12,12" />
        </StackPanel>

        <StackPanel Orientation="Horizontal">
            <dataForm:DataForm x:Name="dataForm1" Header="Order Contact Information" 
                       AutoGenerateFields="False" AutoEdit="False" AutoCommit="False" 
                      CurrentItem="{Binding Data, ElementName=orderDataSource}">
                <dataForm:DataForm.EditTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <StackPanel>
                        <dataForm:DataField Label="First Name">
                            <TextBox Text="{Binding FirstName, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }" />
                        </dataForm:DataField>
                        <dataForm:DataField Label="Last Name">
                            <TextBox Text="{Binding LastName, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Organization">
                            <TextBox Text="{Binding Organization, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Phone">
                            <TextBox Text="{Binding Phone, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Fax">
                            <TextBox Text="{Binding Fax, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Email">
                            <TextBox Text="{Binding Email, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Address 1">
                            <TextBox Text="{Binding Address1, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="Address 2">
                            <TextBox Text="{Binding Address2, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="City">
                            <TextBox Text="{Binding City, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <dataForm:DataField Label="State">
                            <TextBox Text="{Binding State, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                        <StackPanel Orientation="Horizontal" Width="Auto">
                            <dataForm:DataField Label="Zip code">
                                <TextBox Text="{Binding Zip, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                            </dataForm:DataField>
                            <dataForm:DataField>
                                <TextBox Text="{Binding Zip4, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                            </dataForm:DataField>
                        </StackPanel>
                        <dataForm:DataField Label="Country">
                            <TextBox Text="{Binding Country, Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True }"/>
                        </dataForm:DataField>
                    </StackPanel>
                </StackPanel>
            </DataTemplate>
        </dataForm:DataForm.EditTemplate>
            </dataForm:DataForm>

            <StackPanel Orientation="Vertical">
                <TextBlock FontWeight="Bold" FontSize="16" Text="Order Total / Payments" />
                <TextBlock >
                    <Run Text="Order Total:" />
                    <Run Text="{Binding Data.OrderTotal, ElementName=orderDataSource}" />
                </TextBlock>
                <TextBlock Text="Payments" />
                <TextBlock Text="{Binding Data.OrderPaymentItems, ElementName=orderDataSource}" />
                <ListBox ItemsSource="{Binding Data.OrderPayments, ElementName=orderDataSource}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Amount}" />
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

            </StackPanel>
        </StackPanel>
    </StackPanel>

Answer 1

默认情况下，WCF RIA Services不包含子实体。我需要将[Include（）]放在Order对象的OrderPayments属性上。现在就像一个魅力。

无法绑定silverlight中的子集合

1 个答案: